a do or die moment. >> the entertainer says he's not nervous. but with the pressure now on, he's making sure he is well-prepared. more on this, now, from abc's brandi hitt. >> reporter: seth macfarlane does it all. acts, writes. sings, produces and directs. now, just days away from hosting sunday's 85th annual academy awards, macfarlane says this will be his toughest audience yet. >> if you're too soft, they're not going to give you much. if you're too hard on them, they're going to gasp and turn on you. i expect to have them hating me within the first 30 seconds. >> reporter: in fact, the comedian often jokes that no one recognizes him. >> if you don't know who i am, just pretend i'm donny osmond. you'll be fine. we'll get through this. >> reporter: but you probably recognize his comedy, in particular, "family guy," macfarlane created 15 years ago. where he voices most of the characters. his first feature film, "ted,"